EP0802282A1 - Process for preparing hydrolyzable sheet - Google Patents

Process for preparing hydrolyzable sheet Download PDF

Info

Publication number
EP0802282A1
EP0802282A1 EP96935528A EP96935528A EP0802282A1 EP 0802282 A1 EP0802282 A1 EP 0802282A1 EP 96935528 A EP96935528 A EP 96935528A EP 96935528 A EP96935528 A EP 96935528A EP 0802282 A1 EP0802282 A1 EP 0802282A1
Authority
EP
European Patent Office
Prior art keywords
water
sheet
carboxymethyl cellulose
salt
mixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96935528A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0802282A4 (enrdf_load_stackoverflow
Inventor
Naohito Takeuchi
Masanori Monobe
Toshiyuki Okuda
Toshiya Okubo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unicharm Corp
Original Assignee
Unicharm Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP28547995A external-priority patent/JP3150586B2/ja
Priority claimed from JP28548095A external-priority patent/JP3150587B2/ja
Application filed by Unicharm Corp filed Critical Unicharm Corp
Publication of EP0802282A1 publication Critical patent/EP0802282A1/en
Publication of EP0802282A4 publication Critical patent/EP0802282A4/xx
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/25—Cellulose
    • D21H17/26—Ethers thereof

Definitions

  • the present invention relates to a process for manufacturing a water-disintegrable sheet adapted to be dispersed or dissolved in water.
  • wet wipes for cleaning use in household etc. are well known.
  • Water-dispersible or water-disintegrable sheet-like articles typically as wet wipes are also well known, which are rapidly dispersed or disintegrated in water so that they can be directly thrown away into water, for example, in a flush toilet, and flushed down a drain.
  • water-dispersible and water-disintegrable are synonymous with each other.
  • wet wipes having such characteristics are required to have a high strength exhibited while they are used in a wet condition and also a rapid integration when they are thrown away into a large quantity of water. To assure that these strength and integration should be compatible with each other, Japanese Laid-open Patent Application No.
  • Hei1-168999 discloses use of water-insoluble sodium/calcium salt of carboxymethyl cellulose or sodium salt of carboxymethyl cellulose.
  • Japanese Patent Publication No. Sho48-27605 discloses a process for paper making wherein a wet paper sheet obtained from water-insoluble carboxymethyl cellulose is sprayed with aqueous solution of alkaline metal.
  • Japanese Laid-Open Patent Application No. Hei3-167400 discloses a process for paper making including a step of mixing a water dispersion of paper making stuff with water-insoluble alkaline salt of carboxymethyl cellulose.
  • Japanese Laid-Open Patent Application No. Hei5-25792 discloses a process for paper making wherein a paper sheet obtained from a mixture of water dispersion of paper making stuff and alkaline salt of carboxymethyl cellulose is impregnated with hydrated organic solvent containing multivalent metal ion.
  • Carboxymethyl cellulose and/or salt thereof conventionally used by the above-mentioned prior arts generally lose their initial water-insolubility, then show a tendency to swell and finally become water-soluble as degree of substitution (D.S.) and pH thereof increase.
  • D.S. degree of substitution
  • the binders having become water-soluble will be prohibited from being deposited on a sheet as an intermediate product, strength of the sheet will be not so improved as expected from an actual quantity of the binders mixed in a water dispersion of paper making stuff.
  • an aqueous solution of the binders could be sprayed to a sheet obtained from paper making stuff, swollen carboxymethyl cellulose makes an aqueous solution thereof too viscous to be sprayed in a uniform condition.
  • D.S. degree of substitution
  • Said base is preferably sodium carbonate.
  • the process according to the invention may further comprise a step of impregnating said water-disintegrable sheet with aqueous solution to obtain a wet wipe from said sheet.
  • a base is added to the binders before or after a foliating step of a sheet making process.
  • the base can be added during the foliating step if needed. While any appropriate base and combination of bases can be applied, it is preferred to use sodium carbonate for the present invention.
  • well known paper making techniques are used to foliate a mixture of fibers and binders. It is also possible to use a so-called wet or dry method for manufacturing nonwoven fabric or a method for manufacturing nonwoven fabric using water jet streams. The invention will be described more in detail.
  • Coniferous pulp for paper making (NBKP) and carboxymethyl cellulose and/or salt thereof were mixed together and dispersed in city water followed by adding a necessary quantity of sodium carbonate to the water dispersion for preparation of a paper making stuff. After the stuff had been settled for a time, it was subjected to a small-sized paper machine used exclusively for testing to obtain a wet paper sheet which was then dried at a temperature of 110°C for 90 seconds using a dryer of rotary drum type to obtain a dried sheet having a basis weight of 40g/m 2 .
  • Example 1 and Control 1 show effects of sodium carbonate (% by weight) added to carboxymethyl cellulose and/or salt thereof as measured in a dried state during a paper making process.
  • Example 2 and Control 2 show effects of a degree of substitution (D.S.) as well as pH of carboxymethyl cellulose and/or salt thereof.
  • Example 3 and Control 3 show effects of a total quantity (% by weight) of pulp and carboxymethyl cellulose and/or salt thereof.
  • Example 4 and Control 4 show effects of a period for which a water dispersion of pulp and carboxymethyl cellulose and/or salt thereof should be settled after an addition of sodium carbonate during a paper making process.
  • Example 5 shows effects of a mixture ratio of pulp and carboxymethyl cellulose and/or salt thereof.
  • a 10cm X 10cm sample sheet of wet wipe was immersed in 300ml of deionized water contained in a 300ml glass beaker followed by stirring by means of a magnetic stirrer(at 600rpm) and an extent of dispersion of the sample was observed. Observation results were classified as follows:
  • a sample sheet of wet wipe of 25mm wide and 150mm long was elongated at a chucking distance of 100m and at an elongation rate of 100mm/min to get tensile strength. It was found that tensile strength of a wet wipe of at least 300g is sufficient for its practical use.
  • Coniferous pulp for paper making (NBKP) and carboxymethyl cellulose and/or salt thereof were mixed together and dispersed in city water to obtain a paper making stuff which was foliated by a small-sized paper machine used exclusively for testing.
  • a wet sheet thus obtained was sprayed and impregnated with a quantity of aqueous solution of sodium carbonate corresponding to 2.4 - 8% by weight of carboxymethyl cellulose and/or salt thereof wherein said quantity of aqueous solution corresponded to 2.5 times a weight of the sheet as measured in its dry condition. Then, the sheet was dried at a temperature of 110°C for 90 seconds using a rotary drum type dryer and thereby a dried sheet having a basis weight of 40g/m 2 was obtained.
  • the dried sheet was sprayed and impregnated with aqueous liquid consisting of propylene glycol/calcium chloride/deionized water mixed together at a ratio of 30/0.5/69.5(by weight).
  • the impregnated sheet was settled for 24 hours at a temperature of 20°C to obtain a wet wipe.
  • Extent of water-dispersion as well as wet tensile strength of the wet wipe were evaluated under the same condition as Examples 1 - 5. Relationships between Examples and Controls are as follows:
  • Example 6 and Control 6 show effects of a quantity of sodium carbonate (% by weight) added to carboxymethyl cellulose and/or salt thereof as measured in a dried state during a paper making process.
  • Example 7 shows effects of degree of substitution (D.S.) as well as pH of carboxymethyl cellulose and/or salt thereof.
  • water-dispersible fibers are mixed with binders comprising carboxymethyl cellulose and/or salt thereof having low swelling tendency or water-insolubility so that a large quantity of binders can be deposited on a sheet obtained from the mixture of the fibers and the binders.
  • binders are denaturalized by addition of a base to water-swelling or water-soluble ones. These binders contribute to improvement of tensile strength of the sheet. And the sheet is thrown away into a large quantity of water after use, the binders can be rapidly dissolved in the water, allowing the sheet to be rapidly disintegrated and dispersed in the water.

Landscapes

  • Paper (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
EP96935528A 1995-11-02 1996-11-01 Process for preparing hydrolyzable sheet Withdrawn EP0802282A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP285479/95 1995-11-02
JP28547995A JP3150586B2 (ja) 1995-11-02 1995-11-02 水解シートの製造方法
JP28548095A JP3150587B2 (ja) 1995-11-02 1995-11-02 水解シートの製造方法
JP285480/95 1995-11-02
PCT/JP1996/003213 WO1997016597A1 (fr) 1995-11-02 1996-11-01 Procede de fabrication d'une feuille hydrolysable

Publications (2)

Publication Number Publication Date
EP0802282A1 true EP0802282A1 (en) 1997-10-22
EP0802282A4 EP0802282A4 (enrdf_load_stackoverflow) 1997-11-05

Family

ID=26555907

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96935528A Withdrawn EP0802282A1 (en) 1995-11-02 1996-11-01 Process for preparing hydrolyzable sheet

Country Status (7)

Country Link
EP (1) EP0802282A1 (enrdf_load_stackoverflow)
KR (1) KR100235789B1 (enrdf_load_stackoverflow)
CN (1) CN1084415C (enrdf_load_stackoverflow)
CA (1) CA2208759C (enrdf_load_stackoverflow)
MY (1) MY125612A (enrdf_load_stackoverflow)
TW (1) TW306943B (enrdf_load_stackoverflow)
WO (1) WO1997016597A1 (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0900878A3 (en) * 1997-09-08 2000-05-24 Uni-Charm Corporation Water-disintegrable fibrous sheet
WO2001021890A1 (en) * 1999-09-22 2001-03-29 Stfi Method for modifying cellulose-based fiber material
EP1088938A1 (en) * 1999-09-30 2001-04-04 Uni-Charm Corporation Water-decomposable fibrous sheet containing water-insoluble carboxymethyl cellulose
WO2001038638A1 (en) * 1999-11-23 2001-05-31 Kimberly-Clark Worldwide, Inc. Sanitary tissue products with improved flushability
EP1167510A1 (en) * 2000-06-23 2002-01-02 The Procter & Gamble Company Flushable hard surface cleaning wet wipe
SG89387A1 (en) * 2000-03-31 2002-06-18 Uni Charm Corp Multi-layered water-decomposible wiper sheet
EP1166803A3 (en) * 2000-06-28 2003-07-16 Uni-Charm Corporation Absorbent article
EP1090983A3 (en) * 1999-10-05 2003-12-03 Uni-Charm Corporation Water-decomposable fibrous sheet containing gel compound
US6713414B1 (en) 2000-05-04 2004-03-30 Kimberly-Clark Worldwide, Inc. Ion-sensitive, water-dispersible polymers, a method of making same and items using same
WO2004001127A3 (en) * 2002-06-19 2004-04-22 Bayer Chemicals Corp Strong and dispersible paper products
US6815502B1 (en) 2000-05-04 2004-11-09 Kimberly-Clark Worldwide, Inc. Ion-sensitive, water-dispersable polymers, a method of making same and items using same
US7276459B1 (en) 2000-05-04 2007-10-02 Kimberly-Clark Worldwide, Inc. Ion-sensitive, water-dispersible polymers, a method of making same and items using same

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3205705B2 (ja) * 1996-07-26 2001-09-04 ユニ・チャーム株式会社 ウエットワイプスの製造方法
US6579570B1 (en) 2000-05-04 2003-06-17 Kimberly-Clark Worldwide, Inc. Ion-sensitive, water-dispersible polymers, a method of making same and items using same
US6423804B1 (en) 1998-12-31 2002-07-23 Kimberly-Clark Worldwide, Inc. Ion-sensitive hard water dispersible polymers and applications therefor
US6683143B1 (en) 2000-05-04 2004-01-27 Kimberly Clark Worldwide, Inc. Ion-sensitive, water-dispersible polymers, a method of making same and items using same
US6444214B1 (en) 2000-05-04 2002-09-03 Kimberly-Clark Worldwide, Inc. Ion-sensitive, water-dispersible polymers, a method of making same and items using same
US6548592B1 (en) 2000-05-04 2003-04-15 Kimberly-Clark Worldwide, Inc. Ion-sensitive, water-dispersible polymers, a method of making same and items using same
US6653406B1 (en) 2000-05-04 2003-11-25 Kimberly Clark Worldwide, Inc. Ion-sensitive, water-dispersible polymers, a method of making same and items using same
US6835678B2 (en) 2000-05-04 2004-12-28 Kimberly-Clark Worldwide, Inc. Ion sensitive, water-dispersible fabrics, a method of making same and items using same
US7101612B2 (en) 2000-05-04 2006-09-05 Kimberly Clark Worldwide, Inc. Pre-moistened wipe product
US6599848B1 (en) 2000-05-04 2003-07-29 Kimberly-Clark Worldwide, Inc. Ion-sensitive, water-dispersible polymers, a method of making same and items using same
US6586529B2 (en) 2001-02-01 2003-07-01 Kimberly-Clark Worldwide, Inc. Water-dispersible polymers, a method of making same and items using same
US6897168B2 (en) 2001-03-22 2005-05-24 Kimberly-Clark Worldwide, Inc. Water-dispersible, cationic polymers, a method of making same and items using same
US6908966B2 (en) 2001-03-22 2005-06-21 Kimberly-Clark Worldwide, Inc. Water-dispersible, cationic polymers, a method of making same and items using same
US6828014B2 (en) 2001-03-22 2004-12-07 Kimberly-Clark Worldwide, Inc. Water-dispersible, cationic polymers, a method of making same and items using same
US7070854B2 (en) 2001-03-22 2006-07-04 Kimberly-Clark Worldwide, Inc. Water-dispersible, cationic polymers, a method of making same and items using same
KR102635615B1 (ko) 2023-07-04 2024-02-14 주식회사 정우세이프티 안전 정보를 출력하는 표지판 및 표지판의 안전 정보제공 방법

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01168999A (ja) * 1987-12-23 1989-07-04 Kao Corp 水易分散性清掃物品
JP2700825B2 (ja) * 1989-03-25 1998-01-21 ライオン株式会社 水解性・吸収性シート状体およびその製造方法
JPH03167400A (ja) * 1989-11-27 1991-07-19 Nichirin Kagaku Kogyo Kk 水解性紙
JPH03180596A (ja) * 1989-12-06 1991-08-06 Nichirin Kagaku Kogyo Kk 溶解残渣の少ない水溶性紙
JP3243066B2 (ja) * 1992-10-29 2002-01-07 ニチリン化学工業株式会社 水分散性シートの製造方法
US5487813A (en) * 1994-12-02 1996-01-30 The Procter & Gamble Company Strong and soft creped tissue paper and process for making the same by use of biodegradable crepe facilitating compositions

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0900878A3 (en) * 1997-09-08 2000-05-24 Uni-Charm Corporation Water-disintegrable fibrous sheet
US6132557A (en) * 1997-09-08 2000-10-17 Uni-Charm Corporation Water-disintegratable fibrous sheet containing fibers having different fiber lengths and process for producing the same
WO2001021890A1 (en) * 1999-09-22 2001-03-29 Stfi Method for modifying cellulose-based fiber material
EP1088938A1 (en) * 1999-09-30 2001-04-04 Uni-Charm Corporation Water-decomposable fibrous sheet containing water-insoluble carboxymethyl cellulose
US6547927B1 (en) 1999-09-30 2003-04-15 Uni-Charm Corporation Water-decomposable fibrous sheet containing water-insoluble carboxymethyl cellulose
EP1090983A3 (en) * 1999-10-05 2003-12-03 Uni-Charm Corporation Water-decomposable fibrous sheet containing gel compound
US6548427B1 (en) 1999-11-23 2003-04-15 Kimberly-Clark Worldwide, Inc. Sanitary tissue products with improved flushability
WO2001038638A1 (en) * 1999-11-23 2001-05-31 Kimberly-Clark Worldwide, Inc. Sanitary tissue products with improved flushability
SG89387A1 (en) * 2000-03-31 2002-06-18 Uni Charm Corp Multi-layered water-decomposible wiper sheet
US6713414B1 (en) 2000-05-04 2004-03-30 Kimberly-Clark Worldwide, Inc. Ion-sensitive, water-dispersible polymers, a method of making same and items using same
US6815502B1 (en) 2000-05-04 2004-11-09 Kimberly-Clark Worldwide, Inc. Ion-sensitive, water-dispersable polymers, a method of making same and items using same
US7276459B1 (en) 2000-05-04 2007-10-02 Kimberly-Clark Worldwide, Inc. Ion-sensitive, water-dispersible polymers, a method of making same and items using same
WO2002000084A3 (en) * 2000-06-23 2002-04-04 Procter & Gamble Flushable hard surface cleaning wet wipe
EP1167510A1 (en) * 2000-06-23 2002-01-02 The Procter & Gamble Company Flushable hard surface cleaning wet wipe
EP1166803A3 (en) * 2000-06-28 2003-07-16 Uni-Charm Corporation Absorbent article
US6747186B2 (en) 2000-06-28 2004-06-08 Uni-Charm Corporation Water-decomposable absorbent article
AU778346B2 (en) * 2000-06-28 2004-12-02 Uni-Charm Corporation Absorbent article
WO2004001127A3 (en) * 2002-06-19 2004-04-22 Bayer Chemicals Corp Strong and dispersible paper products
US7767059B2 (en) 2002-06-19 2010-08-03 Kemira Oyj Strong and dispersible paper products

Also Published As

Publication number Publication date
WO1997016597A1 (fr) 1997-05-09
EP0802282A4 (enrdf_load_stackoverflow) 1997-11-05
MY125612A (en) 2006-08-30
CA2208759C (en) 2003-03-11
KR987001056A (ko) 1998-04-30
CN1084415C (zh) 2002-05-08
CN1172515A (zh) 1998-02-04
CA2208759A1 (en) 1997-05-09
TW306943B (enrdf_load_stackoverflow) 1997-06-01
KR100235789B1 (ko) 1999-12-15

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